Final answer:
High-density lipoproteins (HDLs) are known as 'good cholesterol' because they transport excess cholesterol to the liver for removal, which helps prevent the buildup of plaque in arteries and protects against heart disease.
Step-by-step explanation:
High-density lipoproteins (HDLs) are considered healthier to the heart because they aid in the transport of excess cholesterol to the liver, where it can be metabolized and removed from the body. This process reduces the likelihood of cholesterol depositing in the arterial walls, which can lead to atherosclerosis—a condition that can cause heart attacks and strokes. HDLs are therefore often referred to as "good cholesterol" because they help maintain healthy cholesterol levels and protect against heart disease. Conversely, low-density lipoproteins (LDLs) carry cholesterol from the liver to other tissues and are known as "bad cholesterol" because they contribute to the buildup of plaque in arteries, increasing the risk of cardiovascular events.